The U.S. nuclear power business is in trouble, and Exelon has six units totaling more than 5,300 MW of dependable capacity on the chopping block. How will the Chicago electricity giant respond? Perhaps by acquiring more merchant nuclear capacity?

Chicago-based Exelon Corp., the largest nuclear power generator in the U.S., is facing what could be the greatest challenge in the company’s history. Exelon confronts the potential shutdown of six operating nuclear generating units at four stations, out of a fleet of 23 units at 14 stations across the country.

This comes after Exelon essentially abandoned coal, selling off its interests in coal-fired generation. In late 2014, the company unloaded its last minority shares in major coal generation, the Keystone (42%) and Conemaugh (32%) plants in central Pennsylvania, once a significant element in its power mix (see sidebar “Exelon’s Generating Fleet”). RTO Insider newsletter commented, “Exelon once had extensive coal-fired generation but has either sold or retired them over the years as it concentrated on new gas-fired generation and its massive nuclear fleet.”…

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